Controlled phase and crystallinity of FeNCN/NC dominating sodium storage performance

Abstract

FeNCN is a kind of potentially fast charging sodium ion anodes due to lots of broad tunnels and high electronic conductivity. However, FeNCN is rarely investigated due to its complicated...

Low-content SnO2 nanodots on N-doped graphene: lattice-confinement preparation and high-performance lithium/sodium storage

“…2 In examining what may lie beyond LIBs, [3][4][5] the sodium-ion battery (SIB) appears to be a promising supplement or even a potential alternative to LIBs in large-scale energy storage systems, due to the abundant sodium resources and low cost, as well as, in particular, working principles that are similar to those of LIBs. [6][7][8][9][10][11][12] The large ionic radius of Na + (1.02 Å), however, results in sluggish transfer kinetics, and poor energy density and cycling performance of SIBs. Therefore, it is of great sig-nificance to develop high-performance anode nanomaterials for LIBs and SIBs.…”

Optimized Phase and Crystallinity of Cr2(NCN)3 Dominating Electrochemical Lithium Storage Performance

“…Raman spectra were recorded to identify their crystalline components. In Figure b, all samples show four Raman bands, where two bands at 1385 and 1583 cm –1 are due to D and G bands of N-doped carbon, resulting from the polymerization of NCN sources. − Another band around 1473 cm –1 is attributed to the symmetrical vibration (ν s ) of (NCN) 2– in Cr 2 (NCN) 3 while the other at 1285 cm –1 might be due to the red-shifted overtone of the bending mode (2δ (NCN) 2– ) . Fourier transform infrared (FT-IR) spectra were also collected to identify their chemical structures.…”